The vocal repertoire in Northern white rhinoceros Ceratotherium simum cottoni as recorded in the last surviving herd
The Northern White Rhinoceros Ceratotherium simum cottoni is a subspecies of the White Rhino that is almost extinct in the wild. We studied the last reproducing herd kept in Zoo Dvur Kralove to describe its vocal repertoire. The calls produced by eight individuals were recorded and analysed as concerned both sound properties and behavioural contexts […]
Signals in intra-sexual competition between ring-necked pheasant males
Many sexual ornaments are signals commonly used in both sexual selection contexts: mate choice and intra-sexual competition. Previous studies show that female choice in ring-necked pheasants,Phasianus colchicus, is influenced by features of some male ornaments. Experiments and correlational data were used in this study to investigate the role of male ornaments in male-male agonistic encounters. […]